Socket for incandescent electric lamps.



D. E. BOWN.

SOCKET FOR INCANDESOENT ELECTRIC LAMPS. APPLIGUION FILED Emme, 190e.

949,5 l 'l Patented Feb.- 15, 1910.

4 f im" lui INVENTOR- DAVID E. BOWN, OF PTTSBURG, PENNSYLVAIA.

SOCKET FOR NCANDESCENT ELECTRIC LAMPS.

Specification of Letters Patent.

Patented Feb. i5, 1mi?.

Application led February 16, 1909. Serial No. 478,297.

To all whom 'it may concern:

Be it known that I, DAVID E. BoWN, a resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Sockets for Incandescent Electric Lamps; and I dohereby declare the following to be a full, clear, and exact descriptionthereof.

My invention relates to sockets for incandescent electric lamps, and hasspecial reference to what are known as security snap sockets. r

The object of my invention is to provide a cheap, simple and efficientform of a socket o'f` this class whereby the top or cap when attached tothe body or casing by the usual -joint connection, will be securely heldin place until it is desired to release the same.

My invention consists, generallystated, in the novel arrangement,construction and combination of parts, as hereinafter more specificallyset forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains toconstruct and use my improved socket, I will describe the same morefully, referring to the accompanying drawing, in which- Figure 1 is aside elevation, partly. broken away ot a socket embodying my invention.F ig. 2 is a vertical central section of the same. Fig. isa like viewshowingv some otthe parts in full lilies and with the key in position torelease the cap from the casing. Fig. 4.- is a detail view ot' theinside ot the ap showing the key and its seat. Fig. is a sectional view,partly in full lines, showing another iorm of my invention.

Like symbols of reference herein indicate like parts in each of thefigures ot the drawing.

As illustrated in the drawing 1 represents the usual metallic top or capof the socket, which is provided with the usual threaded nipple 2through which the usual wires lead from their connections within thesocket, and such cap fits over the usual inetallic outer shell or casing2. A head base or block of insulating material 3 is confined in anysuitable manner within the cap 1 and casing 2, and it carries the usualthreaded metallic inner shell 4l. at the lamp end of the socket. Alining 5 of suitable insulating material is secured to and within thecasing 2 and it extends between said casing and the inner shell 4.

The cap l is connected to the body or casing 2 by mea-ns of lugs orheaded pins which extend inwardly from said cap, and when the cap isplaced in position on the casing the said pins will pass through thevertical portions 7 oi? the slots 7 in the up per end of said casing. sothat when the cap is turned such pins will enter the horizontal portions7 of said. slots and 'thereby snpport the cap in position on the casingby this usual bayonet jointconnection.

ln order to hold or secure the cap l in its connected position on theshell or casing 2 `spring means are employed in connection with saidcap, and when the usual key 8 is used in the socket prete -ably inconjunction therewith, Such means being the use ot' a spiral spring 9seated in the block 3 at one end and engaging under the rod or spindle8' at its other end. In such case the key 8 is arranged in any suitablemanner at its inner end to enable the same to be moved longitudinally atthe socket at its outer end and its spindle 8 moved within slots 1l. andl2 in the cap 1 and casing 2 respectively and registering with eachother when the cap in position, so that when the said cap is beingplaced on the said casing for positioning, the said key can be depressedby its spindle 8 moving in the slot 12, and the spring 9 engaging withsaid spindle will be compressed thereby through the grasping of thehandle or thumb piece 10 of said key, as shown in Fig. 3. After this isdone and the cap 1 has been placed in position on the cas ing 2 byturning as before. described, the key 8 is released and the spindle S otthe same -will be forced 'along thc slot 12 in said casing and into theslot 11 in the said cap by the compression on the spring 9 being thusreleased, so that said spindle will be thus held within said slots byiid spring and thereby hold the cap in its position on the casing. It'desired, the spindle 8 or' the key S can be provided with lugs 1.3 oneach side of the same tor fitting within an enlarged portion '12%' inthe slot 11 in the cap 1. as shown in Fig. il. so that when the said kryis in engagement with said slot as before scribed, and the key turned inoperating, t said lugs engaging with said enlarged portions of saidYslot will assist in holding the cap 1 in place on the casing 2.

Then it is desired to remove the cap l from the casing 2, the key S isturned so that the lugs 13 on the spindle 8 are in line with the slots11 and 12 and then upon said key being depressed as before described andbeing so held, the cap 1 can be turned, so that the pins 6 on .the samewill move along the horizontal portions 7 of the slots 7 in the casing 1to a position opposite the Vertical portions 7 in said slots, when thesaid cap f can beremoved by passing the said. pins through said verticalportions.

In ig. 5 my improved device for holding the cap l in position on thelcasing 2 is shown as applied to a keyless socket, in which the springmeans is in the form of a leaf spring 14 bent to L-.shape and having alip 14 at the outer end on one portion for passing through and lfittingWithin the slots 11 and 12 in said cap and casing respectively, When thecap is in position. The inner end of this spring 14 is secured to theupper face of the block 3, and the other portion of said spring carryingsaid end is adapted to be seated in a recess 15 in said face, Which isprovided with an inclined bottom 16, so that when the said spring isdepressed from engagement with the slot 11 in the cap 1 to free said capthrough pressure in grasping the lip 14 the said lip will move Withinthe slot 12 in the casing 1 and the portion of said spring carrying saidlip will move Within the said block, while the inner" orother portionor" said spring Will be moved ltoward the said bottom 16, and therebypermit the cap to be removed from the casing.

Various other modifications and changes in the design, construction andoperation of my improved socket may be resorted to Without 'departingfrom the spirit of the invention or sacrificing any ofits advantages.

What I claim as my invention and desire to secure by Letters Patentis- 1. In a' lamp-socket, thel combination of the outer shell or casing,a, cap removably held in engagement With said casing, a block within said casing, and s means on said block `for loc position on said casing.

.2. In a lamp-socket, the'combination'of the outer shell or casing, a.cap removably held in engagement with said casing, a block within saidcasing, and spring controlled means on said block for engaging with saidcasing and cap to lock said cap in position on said casing.

i 3. In a lamp-socket, the combination 'of the outer shell or casing, acap removably held in en agement with said casing, a block Wit-hin saicasing, a longitudinally movable key on said block and engaging Withsaid casing and cap vto lock said cap in position on said casing, and aspring on said block for engaging with said key.-

4. In a lamp-socket, the combination of the outer shell or casing, -acap removably held in engagement With said casing, a block Within saidcasing, a longitudinally movable key in said block and` engaging Withsaid casing and cap through slots therein to lock said cap in positionon said casing, and a spring on said block for engaging with said 5. Ina lamp-socket, the combination of the outer shell or casing, a capremovably held in engagement with said casing, a block Within said easina longitudinally movable key in said bock and engaging with said casinand cap through slots therein to lock te cap in position on said casing,lugs on said key for engaging with enlarged portions in the cap slots,and a spring on said block for engaging with said In testimony whereof,I, the said DAVID E. BowN, have hereunto set my hand.

' DAVID E. BOWN.

ring controlled Witnesses:

JAMES L. WEHN, J. N. COOKE.

ing said cap in

